Iranian-linked hackers have attacked U.S. banks before with widespread Distributed Denial of Service, or DDoS, attacks. Rafe Pilling, Director of Threat Intelligence at the cybersecurity firm Sophos, says banks are better prepared to fend those off as war in the Middle East intensifies.

As the war in the Middle East intensifies, one risk facing American banks is the possibility of cyber attacks by hackers linked to Iran.
There is some historical precedent for this: from late 2011 to mid-2013, nearly 50 financial institutions in the U.S. were attacked repeatedly by a group of hackers aligned with the Iranian government. The attacks disabled bank websites and prevented customers from accessing their accounts.
Marketplace’s Stephanie Hughes spoke with Rafe Pilling, Director of Threat Intelligence with the cybersecurity firm Sophos about what those attacks looked like and whether banks are better equipped to fend off those attacks now.
Seven Iranians Working for Islamic Revolutionary Guard Corps-Affiliated Entities Charged for Conducting Coordinated Campaign of Cyber Attacks Against U.S. Financial Sector - from the Federal Bureau of Investigation (2016)